JPH0591207A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To obtain the service utilizing a signal channel and to provide the terminal equipment in the case of communication with the communication terminal equipment not having a communication function by the signal channel of ISDN. CONSTITUTION:A control program executed by a CPU 81 and a character/ picture conversion table or the like to convert the character information into picture data (font data) are stored in a ROM 82. A RAM 83 is provided with a work area or the like to store date time information received from a network as character data. A CPU 81 stores the date time information to the RAM 83 when a CONN signal received from the network via a D channel of the ISDN includes the date time information and the information is converted into a font data by the character 7 picture conversion table in the ROM 82 and a G3 communication control section 89 and a line interface 810 make transmission to an opposite party via a B channel of the ISDN.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device connectable to a digital line network such as ISDN (Integrated Service Digital Communication Network).

[0002]

2. Description of the Related Art FIG. 8 shows a communication sequence in a circuit switching mode in ISDN. In particular, a calling terminal communicates with a partner terminal via an information (B) channel of 64 Kbps. The case where communication is performed with a network via a signal (D) channel is shown. First, a SET UP message 11 is transmitted from the calling terminal to the network. this
The SET UP message 11 is a switching mode for selecting circuit switching or packet switching, information transfer capability for selecting voice or digital, information transfer speed, service type indicating facsimile, telephone or teletex, etc. It has information elements such as a person's address.

When the network receives this SET UP message 11, the same SET UP message 1 is sent according to the instruction.
2 is transmitted to the partner terminal, and when the partner terminal receives this SET UP message 12, it sends back a CALL PROC message 13 to the network. Upon receiving this CALL PROC message 13, the network sends a similar CALL PROC message 14 to the calling terminal. The partner terminal sends a CONN message 15 to the network when responding to this call, and when the network receives this CONN message 15, it returns a CONN ACK message 16 to the partner terminal and also sends a CONN message 17. Send to the calling terminal. When the calling terminal receives the CONN message 17 from this network, it returns a CONN ACK message 18 to the network, and then can communicate with the other party via the B channel.

With the spread of ISDN, which is an integrated digital network, many communication terminal devices connectable to ISDN have been proposed. For example, an image terminal such as a facsimile terminal that transmits a still image or a video terminal that transmits a moving image has much more information to handle originally than a data terminal such as a teletex. Therefore, it is faster than a conventional analog network. Further effectiveness is recognized when used by connecting to a ISDN capable of transmission. ISDN can provide various convenient services to users, which are not present in conventional analog networks. Examples of such services are as follows.

(1) Originally, the D channel is used to transmit a call control message between terminals and the network, and the B channel is used to perform communication between terminals. "User information" can be transmitted between terminals via the D channel protocol (layer 3) as shown in FIG. The "user information" is set in the "user / user information element" in the call control message of the D channel layer 3 protocol as shown in detail in FIG. That is, the terminal can transmit the "user information" not only through the B channel but also during the call control procedure through the D channel.

(2) Further, as described above, originally, the D channel is used for transmitting a call control message between the terminal and the network, but this call control message is added from the network side. A specific information element may be set and transmitted to the terminal. For example, it is known that the date information element as shown in FIG. 11 is added to the CONN message 17 shown in FIG.

Therefore, by utilizing this "user information", a circulation system between terminals is realized via the D channel of ISDN as shown in FIG. 12 or obtained from the network as shown in FIG. The "date information element" is notified to the partner terminal, and as shown in FIG. It is known to display, print, etc. FIG. 13 shows the communication sequence of the G4 facsimile, in which the calling facsimile obtains the date and time information from the date information element in the CONN message 17 received from the network in the D channel communication and transfers it to the B channel. CCITT Recommendation T.S. 62 CSS (Command
Session Start) signal and send it to the called facsimile. In this case, the called side facsimile can obtain the date and time information from the transmitting side.

[0008]

SUMMARY OF THE INVENTION However, ISD
N terminal is a communication terminal connected to an analog network or ISDN
When communicating with a communication terminal or the like indirectly connected to the ISD via a line adapter or the like, since these communication terminals do not have a D channel communication function, the above-mentioned ISD
There is a problem that the service by N D channels cannot be used. Also, CCITT G3 and G2
When communicating with a facsimile that complies with the recommendations, the B-channel message procedure for transmitting character information such as characters and numbers obtained from the network is not standardized, so the above date information and D-channel communication diagnosis are performed. Unable to send stored D-channel procedure for test.

In view of the above-mentioned conventional problems, the present invention is an ISD.
Provided is a communication terminal device connectable to a digital line network, which can provide a service using the signal channel when communicating with a communication terminal that does not have a communication function by a signal line of a digital line network such as N. The purpose is to do.

[0010]

In order to achieve the above object, the present invention relates to a communication terminal device connectable to a digital line network, which stores character information received via a signal channel of the digital line network. Means, converting means for converting the character information stored in the storage means into image data, and transmitting means for transmitting the image data converted by the converting means through the information channel of the digital line network. Is characterized by.

[0011]

According to the present invention, since the character information received through the signal channel of the digital network is converted into image data and transmitted through the information channel of the digital circuit according to the above structure, the signal channel of the digital network is transmitted. It is possible to provide a service using a signal channel even to a communication terminal that does not have the communication function of.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a schematic configuration of a facsimile apparatus which is an embodiment of a communication terminal apparatus according to the present invention, FIG. 2 is a flow chart for explaining the operation of the facsimile apparatus of FIG. 1, and FIG. 2 is an explanatory view showing a communication sequence in the operation of FIG. 2, FIG. 4 is an explanatory view showing a case of converting date and time information from the network into character data, and FIG.
6 is an explanatory diagram showing font data in the OM, FIG. 6 is an explanatory diagram showing a transmission procedure of image data of the facsimile apparatus of FIG. 1, and FIG. 7 is an explanatory diagram showing an MH encoding table in the ROM of FIG. ..

In FIG. 1, the facsimile apparatus of this embodiment is connected to an ISDN and is configured to support a communication function according to CCITT Recommendation G3. CP
A U (central processing unit) 81 controls the entire facsimile device, and a ROM (read only memory) 82 previously stores a control program executed by the CPU 81.
A character / image conversion table for converting character information such as characters and numerical values into image data (font data), an MH (Modified Huffman) encoding table as shown in FIG. 7, and the like are stored. A RAM (Random Access Memory) 83 has a work area for temporarily storing data and the like necessary for control of the CPU 81, and for storing date and time information received from the network by the CPU 81 as a character code, as will be described later. ..

The reading unit 84 is configured to read an image of a transmission document by photoelectric conversion and convert it into image data, and the recording unit (printer) 85 is configured to record and print the received image data on a recording sheet. ing. Further, the D channel control unit 87 is configured to execute a call control procedure with the network via the ISDN D channel, and the G3 communication control unit 89 controls the CCIT via the ISDN B channel.
It is configured to execute the G3 communication procedure according to the T recommendation. The line interface 810 distributes the data generated by the D channel control unit 87 and the G3 communication control unit 89 to the D channel and the B channel of the ISDN bus, respectively, and also receives the signals received from the D channel and the B channel of the ISDN bus. It is configured to be distributed to the D channel control unit 87 and the G3 communication control unit 89, respectively.

Next, the operation of the facsimile apparatus of this embodiment will be described with reference to FIGS. The CPU 81 first
The D channel control unit 87 is instructed to transmit the SET UP signal, and the D channel control unit 87 sends the SET UP signal to the D channel control unit 87.
Transmission to the network via the channel (step S in FIG. 2)
1). When the D channel control unit 87 receives the CALL PROC signal from the network, the process proceeds from step S2 to step S3.
When the D channel controller 87 receives the CONN signal from the network, the process proceeds from step S3 to step S4.

In this case, as shown in FIG. 3, when the network receives the SET UP signal from the facsimile apparatus (step S1 in FIG. 2), the network sends a similar SET UP signal to the other party's terminal and the other party's terminal. When the SET UP signal is received, the CALL PROC signal is transmitted to the network, and when the CALL PROC signal is received, the network transmits the CALL PROC signal to the facsimile machine (step S2). And the other terminal is
When the call is answered, the CONN signal is transmitted to the network (step S3). When the network receives this CONN signal, it transmits the CONN signal to the facsimile device, when the facsimile device 6 receives this CONN signal, it transmits the CONN ACK signal to the network, and when the network receives this CONN ACK signal, it transmits it. By transmitting the CONN ACK signal to the partner terminal, the line between the facsimile apparatus of this embodiment and the partner terminal is established.

Here, from the network to the facsimile machine
The CONN signal may include a date information element identifier, a date content length, and date information consisting of year, month, day, hour, minute, and second as shown on the left side of FIG. Therefore, in step S4 shown in FIG. 2, it is determined whether or not this date / time information is included in the CONN signal. When the date and time information is not included, the date and time information storage area (address XX) of the RAM 83 is cleared (step S5), and when included, the date and time information is stored in this area of the RAM 83 (step S).
6).

When stored in the date / time information storage area of the RAM 83, the date / time information in the CONN signal is once converted into character data (ASCII data) as shown on the right side of FIG. That is, 1 byte of each numerical data of year, month, day, hour, minute, second of date and time information is divided into upper 4 bits and lower 4 bits and converted into character data of "0" to "15" in decimal level. To be done. In this case, the numerical values “0” to “9” are directly converted to the character codes “0” to “9”, and the numerical values “10” to
"15" is converted into character character codes "A" to "F", respectively. Further, codes of special characters “′”, “/”, and “:” indicating the division of year, month, day, hour, minute, and second of date and time information are inserted for each division.

Returning to FIG. 2 and FIG. 3, the CPU 81 uses the CONN
The D channel control unit 87 is instructed to transmit the ACK signal to the network (step S7), and the line between the facsimile device 6 of this embodiment and the partner terminal is established. In the following step S8, the G3 communication control unit 89 sends the DIS from the partner side.
It waits until it receives a signal (digital identification signal), and when it receives, it proceeds to step S9, and the G3 communication control unit 89 sends a DCS signal (digital command signal) to the other party.
And send a TCF (Training Check) signal. In the following step 10, the G3 communication control unit 8
It waits until 9 receives the CFR (reception preparation confirmation) signal from the other party, and when it receives, it proceeds to step S11.

In step S11, the RAM 83 described above is used.
It is determined whether or not the date and time information storage area (address XX) has been cleared. ROM8 if cleared
The blank line is converted into image data by the character / image conversion table of No. 2 and transmitted to the other party (steps S12, S
14) On the other hand, if not cleared, the ROM 82
The date / time information in the RAM 83 is converted into image data by the character / image conversion table of and is transmitted to the other party (steps S13 and S14).

FIG. 5 shows the format of the two-dimensional font data corresponding to the character data (in the figure, the font data of the character "9" is shown), and the character data stored in the date and time information storage area of the RAM 83 is It is converted into such font data and transmitted to the other party. In addition, FIG.
7 shows the font data in which the date and time information in the CONN signal is converted. The font data of each character is first the data of the first line a in sequence, and the CCITT as shown in FIG.
Recommendation T. One-dimensional type M according to the table defined in 4.
After being converted into H code, the data of the following lines b and c are sequentially MH coded line by line, and G3 standard image data is created and transmitted to the other party.

Therefore, according to the above embodiment, since the date and time information received from the network via the D channel is converted into image data and transmitted, the partner terminal is connected to an analog network or ISDN. Date and time information can be notified even when indirectly connected via a line adapter or the like, and as shown in FIG. 14, the D channel procedure is stored for a diagnostic test of D channel communication. It can be converted into image data and notified to the other party. Further, the received user / user information as shown in FIG. 10 can be temporarily stored, converted into image data of the other party's terminal and transmitted.

[0023]

As described above, according to the present invention, in a communication terminal device connectable to a digital line network, storage means for storing character information received through a signal channel of the digital line network, and the storage. Since it has a converting means for converting the character information stored in the means into image data and a transmitting means for transmitting the image data converted by the converting means through the information channel of the digital line network, the ISDN signal channel. It is possible to provide a service using a signal channel to a communication terminal that does not have the communication function of.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus which is an embodiment of a communication terminal apparatus according to the present invention.

2 is a flow chart for explaining the operation of the facsimile apparatus of FIG.

FIG. 3 is an explanatory diagram showing a communication sequence in the operation of FIG.

FIG. 4 is an explanatory diagram showing a case where date and time information from a network is converted into character data.

5 is an explanatory diagram showing font data in a ROM of FIG. 1. FIG.

FIG. 6 is an explanatory diagram showing a procedure of transmitting image data of the facsimile apparatus of FIG.

7 is an explanatory diagram showing an MH encoding table in the ROM of FIG. 1. FIG.

FIG. 8 is an explanatory diagram showing a communication sequence in a circuit switching mode in ISDN.

FIG. 9 is an explanatory diagram showing a D channel protocol layer 3 of ISDN.

FIG. 10 is an explanatory diagram showing a user-user information element in a call control message of the D channel layer 3 protocol.

FIG. 11 is an explanatory diagram showing date and time information from the network.

FIG. 12 is an explanatory diagram showing a circulation system between terminals via the D channel of ISDN.

FIG. 13 is an explanatory diagram showing a communication sequence in the case of notifying the partner terminal of date and time information via the B channel of ISDN.

FIG. 14 is an explanatory diagram showing a diagnostic test of D-channel communication.

[Explanation of symbols]

 81 CPU (Central Processing Unit) 82 ROM (Read Only Memory) 83 RAM (Random Access Memory) 87 D Channel Control Unit 89 G3 Communication Control Unit 810 Line Interface

Claims (1)

[Claims] 1. In a communication terminal device connectable to a digital line network, storage means for storing character information received via a signal channel of the digital line network, and image data for storing the character information stored in the storage means. A communication terminal device, comprising: a conversion unit for converting the image data into a transmission unit; and a transmission unit for transmitting the image data converted by the conversion unit via an information channel of the digital line network.